Pump



G. C. MARTIN July 3, 1928.

PUMP

Filed Aug. 14, 1923 A TTORNEYS.

Patented July 3, 1928.

GEORGE C. MARTIN, OF LOS ANGELES, CALIFORNIA.

PUMP.

Application filed August 14;, 1923. Serial No. 657,305.

This invention relates to pumps, and particularly to pumps such as used for the dispensation of gasoline and other oils at various service stations, and the invention has 5 for an object the provision of a novel form of pump which is assurance against fire or explosion causing fire, due to breakage in the measuring tank of such pump.

In practicing the invention I may use a measuring pump having a visible chamber member or measuring cylinder or tank within which gasoline or other oil is placed, and which gasoline or other oil as it is dispensed shows the amount of gasoline discharged from such chamber member by means of graduations upon such chamber member, and I surround said visible chamber member with a foraminous member of heat-conducting material whereby if the visible chamber member should become broken gasoline or other oil escaping therefrom would not ignite, due to any heat or fire on the outside of such foraminous member. I also provide suitable drains at the base of such chamber member whereby gasoline or other oil may escape back to the main tank.

lVith the above and other objects in View, the invention consists in the novel and useful provision, formation, construction, associa- 3 tion and inter-relation of parts, members and features, all as shown in the accompanying drawing, set forth in the following statement, and finally point-ed out in the claim.

In the drawing:

Figure 1 is a fragmentary side elevation of a filling pump incorporating the invention;

Figure 2 is a fragmentary side elevation on an enlarged scale, certain parts being in section, of the visible chamber member; and

Figure 3 is a cross sectional view on the line 33 of Figure 2, and looking in the direction of the appended arrows.

Corresponding parts in all the figures are designated by the same reference characters.

Referring with particularity to the drawing, the pump is designated as an entirety by A, of which a is the visible measuring cylinder or chamber member, 5 a heat-conducting and dissipating member, and 0 means for conducting liquid from the cylinder a to any point of service. The pump likewise includes the usual base member 4, and pipes e, certain of which act to hold the measuring cylinder above the base, while others provide for conduits between the source of supply of gasoline or other oil and said cylinder a. In the form of pump shown in Figures 1 and 2 it is customary to provide a glass cylinder (4 and gasoline or fi l other oil is forced up one of the pipes e, as shown at 1 into said cylinder (L completely filling the same. Graduations 2 are provided on the outside of such cylinder (6 so that the amount of gasoline or the like actir 6 ally dispensed through the tube 0 may be seen by a person. The said cylinder is mounted and carried upon a base plate 3 and said base plate is formed with three spaced flanges 4-, 5 and. 6. In the show To ing the flanges are annular and the cylinder (a is confined within the first flange 4-. Ports are provided between the flanges el and 5, and 5 and ('5, as shown at 7 and 8, and a drain pipe 9, being one of the pipes e, communicates with a flanged opening in the ase plate 3, as shown at 10. A hood or top 11 is provided for holding the upper reach of the cylinder at. Adapted to spacedly surround the cylinder a is the member h which may be formed of copper screen or other material adapted to rapidly conduct away heat and the member 7) is confined and held to the flange 5 and likewise held to the top 11. In case of breakage of the cylinder a any gasoline or other oil flowing through the opening caused by break age in the cylinder, would be prevented from exploding or igniting upon contact with the air by the member Z), as the member I) would tend to dissipate any heat and likewise prevent any flame or fire from contacting with the gasoline or other oil upon the surface of the cylinder, and such gasoline or other oil would be recovered by the same being passed through the ports 7 and 8 in the base plate 3, and thence through the pipe 9 back to the supply tank. It is to be noted that I provide a valve 12 in the base plate and immediately above the flanged opening 10, which valve includes a plate 13 formed with ports 1% with a plate member 15 immediately below the plate 13 and held against such plate and closing the ports 14 by means of a spring 16. Thus if gasoline or other oil is received through the ports 7 and 8 the weight of same passing through the ports 1% will press the plate 15 downwardly and out of engagement with the plate 13, whereupon the gasoline or the like will escape into the pipe 9. It is to be noted that in this construct-ion, fumes of gas passing upwardly into the pipe 9 will be prevented from escaping by the type of valve just described. If gasoline or other oil happens to escape through the member I) such gasoline or the like may be recovered by the same being passed through the port 8. I may provide a series of such ports 7 and 8, as illustrated in Figure 3.

If the measuring cylinder a should be broken gasoline or other liquid may splash against the ,foraminous member 6, and this foraminous member will tend to stop out- Ward movement of such liquid and the liquid will flow down both the inside and outside of said member. However, in case of fire, the flame would be; confined to the outside of the member 7), a well-known physical fact that does not require demonstration to prove. If there is no fire then the liquid on the member 6 will flow downwardly thereon and pass through the openings 7 and 8.

It is obvious that various changesand modifications may be made in practicing the invention, in departure from the foregoing showing, without departing from the spirit of the invention.

Having thus disclosed my invention 1 claim and desire to secure by Letters Patent.

Means for reducing the fire hazards in connection with containers of visible gasoline pumps comprising a base plate for supporting the container and having spaced flanges forming channels adapted to receive gasoline from the container in event of breakage, a drain pipe communicating with said channels, anda metallic screen of relatively fine mesh supported on said base plate and extending throughout the height of the container and surrounding the same and to serve as a heat dissipating flame resisting sheath therefor.

In testimony whereof I have signed my name to this specification.

GEORGE c. MARTIN 

